/* ============================================================
   base.css
   Reset + global typography + body + utility helpers.
   Loaded after variables.css so tokens are available.
   ============================================================ */

/* === Modern reset === */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    /* Account for fixed navbar when anchors scroll into view */
    scroll-padding-top: var(--nav-height);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Subtle grid texture matching the reference */
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 40px 40px;
    overflow-x: hidden;
}

/* === Headings === */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 7vw, 5rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.125rem; font-weight: 700; }

p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* === Links & media === */
a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* === Form elements inherit font (browsers default to system) === */
button,
input,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

/* === Focus accessibility — keep visible on keyboard nav === */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* === Utility helpers === */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.text-accent { color: var(--accent); }
.text-muted  { color: var(--text-muted); }

/* === Reveal-on-scroll: starts hidden, fades up when .is-visible added === */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Respect users who turned off motion === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}